Final answer:
The most effective apology is Option B, which offers a sincere apology and a specific solution for the espresso machine issue at no charge, showing a commitment to resolving the problem.
Step-by-step explanation:
The question at hand is regarding the most effective way for Maya to apologize in the buffer of a bad-news message to a client. The best apology in this scenario is:
(B) We sincerely apologize for the problems you experienced with your espresso machine. To prevent recurrence of this problem, we will recalibrate the heating element at no charge to you.
This option clearly acknowledges the issue and offers a specific remedy, which demonstrates a commitment to resolving the problem and maintaining a positive relationship with the client. It is direct, specific, and includes both an apology and a solution, which makes it more genuine and effective than the other options provided.